Evaluation of the structure and shape of the experimentally obtained Ag nanoparticles
S.L. Gafner, L.V. Redel
Katanov Khakass State University
Abstract: Silver is one of the most promising nanomaterials for plasmonic applications due to its low cost as well as the ease with which it can be prepared into nanoparticles with controlled size and shape. By now, it has already become clear that it is the shape and internal symmetry of nanoparticles that can significantly affect the scattering and absorption of a light wave, since without the formation of a strong dipole, these effects in nanoparticles will be insignificant. Therefore, the main objective of the study was a theoretical analysis of the processes of formation of the external and internal structure of silver nanoclusters obtained by some methods of physical synthesis. To do this, we studied highresolution electron microscopy data for the initial and annealed silver nanoparticles formed on a carbon substrate by vacuum thermal evaporation and having sizes from 2,0 to 10,0 nm. It has been established that, as a result of annealing, the number of small nanoparticles (D< 3,5 nm) decreases by approximately 2 times, and the proportion of nanoparticles with icosahedral and decahedral faceting increases by approximately 1,5 times. Based on the analysis performed, conclusions were drawn about the possible features and mechanisms of formation of various types of symmetry in synthesized Ag nanoparticles.
Keywords: nanoclusters, silver, crystallization, structure, computer simulation, high-resolution transmission electron microscopy
- Svetlana L. Gafner – Dr. Sc., Docent, Professor of the Department of Mathematics, Physics and Information Technology, Katanov Khakass State University
- Larisa V. Redel – Dr. Sc., Docent, Docent of the Department of Mathematics,Physics and Information Technology, Katanov Khakass State University
Gafner, S.L. Evaluation of the structure and shape of the experimentally obtained Ag nanoparticles / S.L. Gafner, L.V. Redel // Physical and chemical aspects of the study of clusters, nanostructures and nanomaterials. — 2023. — I. 15. — P. 377-386. DOI: 10.26456/pcascnn/2023.15.377. (In Russian).
Full article (in Russian): download PDF file
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